Chapter 14. The Arthropods: Blueprint for Success. Evolutionary Perspective. Metamerism modified by tagmatization Chitinous exoskeleton Paired, jointed appendages Ecdysis Ventral nervous system Coelom reduced to cavity around gonads Open circulatory system Complete digestive tract
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The Arthropods: Blueprint for Success
Figure 14.2 Evolutionary relationships of the arthropods to other animals.
Figure 14.3 Arthropod exoskeleton.
Figure 14.4 Modifications of the exoskeleton.
Figure 14.5 Events of ecdysis.
Figure 14.6 Subphylum Trilobitomorpha (Saukia sp).
Figure 14.7 A eurypterid, Euripterus remipes.
Figure 14.8a Limulus polyphemus.
Figure 14.8b Ventral view of Limulus.
Figure 14.9 An arachnid book lung.
Figure 14.10 An arthropod seta (a) and an eye (ocellus) (b).
Figure 14.11 (a) Hardrurus arizonensis (b) External anatomy.
Figure 14.12 External structure of Argiope.
Figure 14.13 Prosoma of a spiderling.
Figure 14.14 Members of the family Araneidae are the orb weavers.
Figure 14.15 (a) Black widow spiders (Lactrodectus mactans) has a neurotoxic venom. (b) Brown recluse spiders (Loxosceles reclusa) have a histolytic venom.
Figure 14.16 Order Opiliones (Leiobunum sp).
Figure 14.17 Dermatophagoides farinae is common in homes and grain storage areas.
Figure 11.18 Ixodes scapularis transmits the bacteria that causes Lyme disease.
Figure 14.19 Class Pycnogonida
Figure 14.20 Crustacean body form. (a) External anatomy. (b) Biramous appendages.
Figure 14.22 External structure of a male crayfish.
Figure 14.23 Serial homology of crayfish appendages.
Figure 14.24 Internal structure of a crayfish.
(a) Nauplius larva of a barnacle. (b) Zoea larvae of a crab.
Figure 14.26a Order Isopoda.
Figure 14.26b Order Amphipoda.
Figure 14.27 Order Cladocera.
Figure 14.1 Subclass Copepoda.
Figure 14.28 Class Maxillopoda, Infraclass Cirripedia.
(a) Internal structure of an acorn barnacle. (b) A stalked barnacle (Lepas).